Matronics Email Lists :: View topic - "Starter Engaged" Warning Light Circuit Refresher

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

"Starter Engaged" Warning Light Circuit Refresher

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Feb 18, 2011 7:58 am Post subject: "Starter Engaged" Warning Light Circuit Refresher

At 10:34 PM 2/17/2011, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: Bob Falstad <bobair(at)me.com>



 Bob N.,



 I'm putting a "starter engaged" warning light in my new IFR panel.  I simply hooked the incandescent bulb from my B&C alternator  "low voltage" warning light between a fused wire that runs from the hot side of the starter contactor and ground.  (I now have the standby B&C alternator and will use its controller's "standby alternator on" light in lieu of the low voltage light on the primary alternator controller.) 



 But then I ran across a handwritten sketch that I believe you drew up for this circuit.  It has a 470 Ohm - 1 Watt resistor in the wire between the hot side of the starter contactor and the lamp.  It also shows a 1N4001 protection diode in parallel with the lamp and ground.  It isn't clear from your sketch (and my electrical symbols knowledge is limited) whether the lamp is incandescent or an LED. 	




 This is an incandescent lamp



 [img]cid:7.1.0.9.0.20110218094700.01d98650(at)aeroelectric.com.0[/img] 



 This is an Light Emitting Diode



 [img]cid:7.1.0.9.0.20110218094700.01d98650(at)aeroelectric.com.1[/img] 



   The resistor used with the LED warning circuit as

   sketched serves a dual purpose. It protects the wire

   that runs from starter to lamp by limiting the maximum

   current that could flow in a faulted wire. At the same

   time, it SETS the current intended to illuminate the

   LED.



   For an incandescent warning light, the resistor is

   replaced with a fuse and the incandescent lamp is

   substituted for the LED. No reverse current diode

   is needed.



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

3bd72cf.jpg

Description:

Filesize:

8.64 KB

Viewed:

1463 Time(s)

3bd731d.jpg

Description:

Filesize:

8.05 KB

Viewed:

1463 Time(s)

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Feb 18, 2011 3:06 pm Post subject: "Starter Engaged" Warning Light Circuit Refresher

At 05:43 PM 2/18/2011, you wrote:

  	  Quote: 	
		  Bob N., Is the drawing for this circuit in the Aeroelectric archives? I think I'd like to add it to my very bare bones system. 	




  http://aeroelectric.com/Pictures/Schematics/Starter_Engaged_Warning_Lt.pdf

 

 

  	  Quote: 	
		  Bob N.,



 I'm putting a "starter engaged" warning light in my new IFR panel.  I simply hooked the incandescent bulb from my B&C alternator  "low voltage" warning light between a fused wire that runs from the hot side of the starter contactor and ground.  (I now have the standby B&C alternator and will use its controller's "standby alternator on" light in lieu of the low voltage light on the primary alternator controller.) 



 But then I ran across a handwritten sketch that I believe you drew up for this circuit.  It has a 470 Ohm - 1 Watt resistor in the wire between the hot side of the starter contactor and the lamp.  It also shows a 1N4001 protection diode in parallel with the lamp and ground.  It isn't clear from your sketch (and my electrical symbols knowledge is limited) whether the lamp is incandescent or an LED. 	




 This is an incandescent lamp



 [img]cid:7.1.0.9.0.20110218170144.01fc2908(at)aeroelectric.com.2[/img] 



 This is an Light Emitting Diode



 [img]cid:7.1.0.9.0.20110218170144.01fc2908(at)aeroelectric.com.3[/img] 



   The resistor used with the LED warning circuit as

   sketched serves a dual purpose. It protects the wire

   that runs from starter to lamp by limiting the maximum

   current that could flow in a faulted wire. At the same

   time, it SETS the current intended to illuminate the

   LED.



   For an incandescent warning light, the resistor is

   replaced with a fuse and the incandescent lamp is

   substituted for the LED. No reverse current diode

   is needed.



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

544bf4c.jpg

Description:

Filesize:

8.64 KB

Viewed:

1453 Time(s)

544bf5b.jpg

Description:

Filesize:

8.05 KB

Viewed:

1453 Time(s)

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum